Air-pump.



G. J. SPOHRER AIR PUMP. APPLICATION FILED JUNE 16,1911.

Yatented May 28, 1912.

25 /II/II/IIIIIIIIIIAYIWII Ill WITNESSES M07 z ATTORNEYS pump directly 0 inder.

nr rricn AIR-PUMP.

To all whom, it may concern ,Be it known that I, Gnnconr J. Sronnnn, a citizen of the United States, and a resident of Franklin, in the county of Venango and State of Pennsylvaniarhave invented a new and Improved Air-Pump, of which the following is a full,.clear, an exact description.

y invention relates to a new and improved form of air compression pump, and

more particularly relates to that form of air pump adapted to bep'nstalled on an auto mobile or other road vehiele in which the compressed air is used to actuate an engine starting mechanisn1,.or for other purposes.

.An object of my invention is to provide a pump simple in'construction, of a compact form, and which may be connected at will to a driving element of the engine.

Another object of my invention is to position the reciprocating piston rods of my a rotating member of the engine,

I attain the above outlined objects by disposing a pair of cylinders in axial alinement, each cylinder having a piston head therein and a stem projecting from said head, said stems extending toward each other, the ends of said heads terminating in bearing plates, between which bearing plates is disposed a sliding block attached by means of a clutch to the driving shaft of the engine, whereby the rotation of the shaft Will reciprocate the piston heads on the cyl- The outer'end of each of the cylinders is closed by means of a cap, which cap has inlet and outlet spring-controlled valves so arranged that one stroke ofthepiston .head will draw air into the larger cylinder and on the next stroke will force the air out of said larger cylinder into the smaller cylinder to be there compressed by the next succeeding stroke of the piston head in the smaller cylinder.

With the above and other objects in view, as will more fully hereinafterappear, the

present invention consists in certain noveldetails of construction and arran ement of 'parts hereinafter fully described, illustrated 111 the accompanying drawings, and more particularly pointed out in the appended claims Reference is to'b'ehad to the accompanymg drawings, forming a part of this specificat1on, in which s milar characters of ref- Specification of Letters Patent. Application filed June 16,1911.

"part way into the casing 18 an ticn at right Patented May 28,1912. Serial No. 633,462.

erence indicate corresponding the figures, and in which- Figure 1 is a plan view looking down upon an automobile body and engine shown in outline, and showing in heavy lines, my pump in position; Fig. 2 is a vertical transverse section through the driving shaft and through a preferred embodiment of my in-' tion taken on the line 22 of Fig. 3 and showing the clutch-actuating mechanism in elevation; Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 2, looking in the direction of the arrow and showing part of the reservoir tank in elevation.

In the several figures,

parts in all cessed, into which recessed end is inserted the reduced end 5 of a shaft (5. Adjacent the end of the shaft 4 is a clutch member 7 rigidly fastened to the shaft by means of a key 8, said member having facing teeth 9, which teeth are adapted to be engaged by the teeth-1O on a clutch 11, which clutch is keyed at 12 to the shaft 6 and slidably mounted thereon. The clutch 11 has a'peripheral groove 13 extending thereabout, in which groove is mounted the bifurcated end 14 of a lever 15 pivoted to a lug 16 project ing from-the head 17 of a hollow casing 18. The end of the lever opposite the bifurcated end has attached thereto, one end of a fiexi ble cord 19, the other end of which is connected to one arm'20 depending from a rod 20 mounted inbrackets 21 depending from the platform 22 of the car, projecting through which platform and engaging an arm 24 rigidly attached to the rod 20 is a pedal 23 placed convenient to the operator.

The clutch -11 is kept out of engagement 7 by means of a' with the clutch member spring 25, one end of which bears on the lever 15 and the other end of against a stud 26 projecting from the casing 18. The end of the shaft 6 oppositetlio clutch,.has attached thereto, a crank arm 27 carrying a sliding block 28 square in cross section.

Disposed on opposite vertical sides of the I have shown a mam engine shaft 4, one end. of which is rewhich bears v block 28 is a pair of broad bearing plates 29 H and 30. The plate 30 's connected to a piston rod 31, the-piston ead 32 of which re ciprocates in a piston cylinder 33 extending d in a direcangles to the length of the shaft 6. The cylinder is a single-acting cylinder, the end of the cylinder opposite the end in which the piston rod is inserted,"

form a partial vacuum in the cylinder 33,

permitting atmospheric pressure to open the valve 37' against the action of the spring 38 and permitting air to be admitted into the cylinder On the return stroke of the piston head 32, the pressure of the air Will close the valve 37 and open the valve 40, forcing the air through a pipe 42, through an inlet 43 in a cap 44, which cap corresponds in construction to the cap 35 and is threaded into an enlarged end 45 of a piston cylinder 46, which piston cylinder is in axial alinement with the cylinder 33 and is of materially smaller diameter than said cylinder.

Moving in the cylinder 46 is a piston head 47, connected by means of a stem 48 intogrally connected to the bearing plate 30 hereinbet'ore described. The inlet 43 is controlled by a spring-pressed valve 49, similar in construction to the valve 37 hereinbefore described. On the opposite side of the center of the cap 44. is a second springprcssed outlet valve 49 similar in construction to the 'alve 40 hereinbefore described, and controlling an outlet 50. attached to which outlet is a pipe 51 leading to a compressed air reservoir 52, the pressure in which reservoir is indicated by a pressureindicator It is seen that the air is forced from the cylinder 33 through the pipe 42, raising the valve 49 off its seat and flowing into the cylinder 46. ton head l-l', the air in the cylinder 46 is compressed raising the valve 49 off its seat.

and forcing the air into the reservoir 5Q.

from which it is conveyed from any desired fluid-actuating mechanism.

\Yhilc a preferred embodiment of the invention has been described. it is to be-un- On the return stroke of the pisderstood that many changes could be made in the aboveconstruction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof. It is intended that all matters contained herein in the above description or shown in the accompanying drawings, shall be interpreted as illustrative and not in a limiting sense. It is also to be understood that the language used in the following claims is intended to cover the full scope of the invention and is not to be given any narrower construction than the prior art demands, and that materials, sizes and rclativities of parts are non-essential, except as called for in the claims.

Having thus described my invention, 1' claim as new and desire to secure by Letters Patent:

1. A pump, comprising a'hollow casing, a relatively small piston cylinder integral with one end of said casing, the outer end of said cylinder being enlarged, a cap in en- I gagement with said enlarged end, said cap containing a plurality of valves, a relatively large piston cylinder in axial alinement with said small cylinder, extending partially into said casing, the outer end of said large cylinder being enlarged, a cap in engagement with said enlarged end, and valves in said cap. i

2. A pump, comprising a hollow casing, a, relatively small piston cylinder integral with one end of said casing, the outer end of said cylinder being enlarged, a cap in en gagement withsaid enlarged end, said cap containing a plurality of valves, a relatively large piston cylinder in axial alinement with said small cylinder, extending partially into said casing, the outer end of said large cylinder being enlarged, a cap in engage-' ment with said enlarged endrvalves in said cap, a pair of independent piston rods, one in each piston cylinder and projecting toward each other into said casing and terminating in opposed broad bearing plates, and an actuating block in sliding engagement with said plates, to reciprocate said piston."

Tn testimony whereof I have signed my name to this specification in the presence of wo subscribing witnesses.

:REGORY JOHN SPOHRER. \Yitncsses H. G. READING, -WM. A. MALLoitY. 

